My fear of a pale light was immediately erased: the light diffused by the bulb is hot, naturally.
My second concern related to use of "economic" bulbs (to light tube) that put "some time" to heat and gives them full light was also quickly removed: as soon as you light up the bulb, it is very bright lights and without flutter.
For the duration of use, we will have to wait a little.
One regret: as virtually toues LED bulbs, it does not light downwards, towards its base and therefore, I can not use it on my chandelier that has the bulbs soquets directed toward the ceiling.
